In 1665 Wallis published the first systematic treatise on Analytical conic sections. Analytical geometry was invented by Descartes and the first exposition of it was given in 1637: that exposition was both difficult and obscure, and to most of his contemporaries, to whom the method was new, it must have been incomprehensible. Wallis made the method intelligible to all mathematicians. This is the first book in which these curves are considered and defined as curves of the second degree and not as sections of a cone.
John WallisRelated topics
book conic contemporaries degree exposition geometry given incomprehensible second treatise DescartesRelated quotes
Let me tell you something you haven't learned yet, something you learn only by living awhile. As you get older, you find that life begins to wear you down. Doesn't matter who you are or what you do, it happens. Experience, time, events-they all conspire against you to steal away your energy, to erode your confidence, to make you question things you wouldn't have given a second thought to when you were young. It happens gradually, a chipping away that you don't even notice at first, and then one day it's there. You wake up and you just don't have the fire anymore.
Terry Brooks
We are sometimes told that we are not a biblical church. We are a biblical church. This wonderful testament of the Old World, this great and good Holy Bible is one of our standard works. We teach from it. We bear testimony of it. We read from it. It strengthens our testimony. And we add to that this great second witness, the Book of Mormon, the testament of the New World, for as the Bible says, "In the mouth of two or three witnesses shall [all things] be established" (2 Cor. 13:1).”.
Gordon B. Hinckley
Industrial production, the flow of resources in the economy, the exertion of military effort in a war, the management of finances --all require the coordination of interrelated activities. What these complex undertakings share in common is the task of constructing a statement of actions to be performed, their timing and quantity (called a program or schedule), that, if implemented, would move the system from a given initial status as much as possible towards some defined goal.
George Dantzig
There's one uneasy borderline between what is external and what is internal, and this borderline is defined exactly by the sense organs and the skin and the introduction of external things within my own body. Consciousness is altered by physical events and physical objects, which impinge upon my sense organs, or which I introduce into my body.
Now the name traditionally given to external objects or processes which change you internally is sacrament. Sacraments are the visible and tangible techniques for bringing you close to your own divinity.
Timothy Leary
Twenty or thirty years ago, in the army, we had a lot of obscure adventures, and years later we tell them at parties, and suddenly we realize that those two very difficult years of our lives have become lumped together into a few episodes that have lodged in our memory in a standardized form, and are always told in a standardized way, in the same words. But in fact that lump of memories has nothing whatsoever to do with our experience of those two years in the army and what it has made of us.
Václav Havel